Andy Wickert wrote: > I have been trying to find a way to adjust the opacity (or > transparency, to throw another key word in there) of raster and vector > layers using the command line. This is possible in the wxPython GUI, > but I have a large number of maps to produce, and would like to script > it. So if anyone knows if this is possible with the standard d.* > commands, ps.map, or something else I don't know about - thanks in > advance!
It isn't possible to directly generate images with partial opacity. wxGUI (via g.pnmcomp) uses the opacity values when compositing the layers to form the displayed image. You'll need to use general-purpose image-processing tools such as ImageMagick, netpbm or Python+PIL. Blending between an empty (fully-transparent) image and the source image is probably the easiest approach. -- Glynn Clements <[email protected]> _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
